US5298833A
Expired / Lapsed
US
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Black electrophoretic particles for an electrophoretic image display
Assignee: AUO Corp
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Filing: 1992-06-22
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Granted: 1994-03-29
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Expires: 2012-06-22
Abstract
Abstract The present invention are dielectric black particles for use in electrophoretic images displays, electrostatic toner or the like, and the corresponding method of manufacturing the same. The present invention black particles are latex particles formed by a polymerization technique, wherein the latex particles are stained to a high degree of blackness with a metal oxide.
Inventors
- 👤 Wei-Hsin Hou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:14
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/0802; G03G9/0804; G03G9/0806; C; C08; C08F; C08F8/00; C08F8/42; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G03G17/00; G03G17/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
In an electrophoretic display, having an electrophoretic dispersion that includes dielectric electrophoretic particles suspended in a liquid medium, an improved electrophoretic particle for said electrophoretic dispersion comprising: a particle body comprised of a polymer structure wherein said particle body has a density substantially equivalent to said liquid medium, and wherein said particle body is stained to a desired shade of black by a reaction with a metal oxide.
Claim 2
Dependent Claim
68 words
In an electrophoretic display, having an electrophoretic dispersion that includes dielectric electrophoretic particles suspended in a liquid medium, an improved electrophoretic particle for said electrophoretic dispersion comprising: a particle body comprised of a polymer structure wherein said particle body has a density substantially equivalent to said liquid medium, and wherein said particle body is stained to a desired shade of black by a reaction with a metal oxide.
Claim 3
Dependent Claim
13 words
The display according to claim 1, wherein said polymer structure includes a latex.
Claim 4
Dependent Claim
22 words
The display according to claim 1, wherein said polymer structure is selected from a group consisting of poly(styrene-co-methacrylic acid) and poly(butadiene-co-styrene-co-methacrylic acid).
Claim 5
Dependent Claim
31 words
The display according to claim 1, wherein said polymer structure includes residual double bonds, whereby said residual double bonds react with said metal oxide to produce said desired shade of black.
Claim 6
Dependent Claim
24 words
The display according to claim 1, wherein said particle body includes a core structure and at least one shell layer surrounding said core structure.
Claim 7
Dependent Claim
22 words
The display according to claim 5, wherein said core structure is selected from a group consisting of poly(butadiene-co-styrene), polybutadiene, polyisoprene and polystyrene.
Claim 8
Dependent Claim
31 words
The display according to claim 5, wherein said at least one shell layer is selected from a group consisting of poly(styrene-co-methacrylic acid), poly(methacrylic acid), poly(methyl methacrylate), poly(styrene-co-methyl methacrylate) and poly(butadiene-co-methacrylic acid.
Claim 9
Dependent Claim
41 words
The display according to claim 7, wherein said at least one shell layer includes a polymerized monomer selected from a group consisting of methyl methacrylate, acrylonitride, vinyl chloride, acrylic acid, sodium styrene sulfunate vinyl acetate, chlorostyrene, dimethylaminopropylmethacrylamide, isocyanatoethyl methacrylate and N-(isobutoxymethacrylamide).
Claim 10
Dependent Claim
15 words
The display according to claim 5, wherein said at least one shell layer includes polybutadiene.
Claim 11
Dependent Claim
21 words
The display according to claim 1, wherein said metal oxide selected from a group consisting of osmium tetroxide and ruthenium tetroxide.
Claim 12
Dependent Claim
12 words
The display according to claim 1, wherein said particle body is hollow.
Claim 13
Dependent Claim
12 words
The display according to claim 5, wherein said core structure is hollow.
Claim 14
Dependent Claim
25 words
The display according to claim 9, wherein said at least one layer further includes a shell layer of poly(styrene-co-methacrylic) surrounding the shell layer of polybutadiene.
Claim 15
Dependent Claim
15 words
The display according to claim 5, wherein said core structure includes a conjugated diene compound.
Claim 16
Dependent Claim
24 words
The Display according to claim 14, wherein said conjugated diene compound is selected from a group consisting of diacrylate, triacrylate, tetraacrylate, dimethacrylate and trimethacrylate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |